<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <script src="../00.依赖包/react.development.js"></script>
  <script src="../00.依赖包/react-dom.development.js"></script>
  <script src="../00.依赖包/babel.min.js"></script>
  <script src="../00.依赖包/prop-types.js"></script>
</head>

<body>
  <div id="app"></div>
  <script type="text/babel">
    /* 
      porps是用来做父子组件通信的
        - 在父组件中使用子组件的时候,可以给子组件添加属性
        - 在子组件中组件实例的props属性上,就能拿到这个属性和值
    
    */
    class Parent extends React.Component{
      state = {
        car:"八手奥拓"
      }
      render(){
        const {car} = this.state;
        return (
          <div>
            <h1>我是父组件</h1>
            <p>我开的车是{car}</p>  
            <hr/>
            <Child a={1} car={car}/>
          </div>
        )
      }
    }

    class Child extends React.Component{
      render(){
        console.log("Child组件实例",this);
        const {car} = this.props;
        return (
          <p>我是儿子组件,我开我老子的车{car}</p>
        )
      }
      //类式组件做限制 直接在静态方法上添加
      static prototypes = {
        //注意大小写
      car:Prototypes.string.isRequired //isRequired 必填  
      }
    }

    
    
    const root = ReactDOM.createRoot(document.getElementById('app'));
    root.render(<Parent/>)




  </script>
</body>

</html>